$B\to K^* \gamma$ decay on APE

TL;DR

This paper reports on lattice QCD calculations of the radiative decay $B\to K^* \gamma$ using Clover action, examining theoretical models like HQET and pole dominance, with results sensitive to form factor assumptions.

Contribution

It provides lattice QCD results for $B\to K^* \gamma$ decay and discusses the validity of HQET and pole dominance models in this context.

Findings

Compatibility between HQET and pole dominance is analyzed.

Results depend on the assumed $q^2$-dependence of form factors.

The study offers insights into the decay mechanism and theoretical model validity.

Abstract

We present results for the radiative decay $B\to K^* \gamma$, obtained by using the Clover action at $\beta = 6.0$ on APE. The compatibility between the scaling laws predicted by the Heavy Quark Effective Theory (HQET) and pole dominance is discussed. The final result depends crucially on the assumed $q^2$-dependence of the form factors.